Men's Nightwear

Men's nightwear at Mariner Underwear centres on one garment that most sleepwear brands have dropped: the traditional nightshirt. One piece, no waistband, no tangled trouser legs. The Mariner Underwear nightshirt is cut long, falls below the knee, and is made from 100% combed cotton flannel. Warm without being heavy, it does not shift during the night.

If you find men's pyjamas too warm, or the waistband wakes you up, a flannel nightshirt is a practical swap. Available in sizes M to XXL, it earns its place at the end of every winter night. Soft on the skin and simple to care for.

What Is a Men's Nightshirt

A nightshirt is a single-piece garment for sleep, worn without trousers. It sits somewhere between a long top and a short dress, falling comfortably below the knee. Unlike men's pyjamas, there is nothing cinching the waist or bunching at the legs during the night. You put it on, and it stays put.

Mariner Underwear has made this style of men's nightwear since 1967. The cut is relaxed and roomy, designed to fit comfortably across all body shapes from M to XXL. A versatile piece that works on cold winter nights and mild autumn mornings alike.

100% Combed Cotton Flannel

Combed cotton goes through an extra process that removes shorter, coarser fibres, leaving longer, smoother fibres in the yarn. The result is a denser weave that stays cosy straight from the packaging and holds up wash after wash without pilling or going thin.

Flannel is created by lightly brushing the surface of this weave. That brushing raises the fibres slightly, creating a warm, fuzzy texture. It traps warmth efficiently, which makes it the right choice for winter bedrooms and chilly evenings. The colour stays true through repeated washing.

No synthetic blends. It does not trap moisture the way polyester does, which means you stay warm without overheating. Good for cold rooms and cool rooms alike. The brushed surface holds up even after dozens of washes.

Button-Down Collar, Long Sleeves, Navy Check Print

The Mariner Underwear nightshirt buttons fully down the front. The collar opens wide enough to pull on and off without the gymnastics required by a pullover top. Long sleeves cover the arms fully, which matters when the bedroom gets cold in winter. The cuffs sit neatly and do not ride up during sleep.

The check print uses classic red and navy colour on a white ground. A traditional block check, well-suited to the British winter. The navy and red stays bold after repeated washing.

How It Fits

The cut is deliberately generous. A nightshirt should have room to move in, not just sit still in. The length falls below the knee for full coverage through the night. Across the chest and shoulders the fit is roomy without being shapeless.

Take your usual size. If you are between sizes and prefer more volume, go one size up. The relaxed fit works well across body types, and the flannel does not dig in anywhere. Sizes run from M to XXL.

Snug enough to retain warmth, comfy enough to move freely in. A good fit for sleep and for a lazy weekend morning around the house. If you want a pair to alternate through the week, the sizing stays consistent across the range.

Nightshirt vs Pyjama Set: A Different Kind of Men's Nightwear

Most men's nightwear collections are built around pyjama sets, or PJs: two pieces, a coordinated top and pyjama bottoms, often in jersey or cotton mix. That works for a lot of men. For others, a single-piece nightshirt is a better fit, literally and practically.

There is nothing to tuck back in. No drawstring to retighten after getting up in the night. The nightshirt sits evenly on the body and moves with you. For men who tend to move around, the single-piece flannel cut is often more comfortable than a two-piece pyjama set. As the temperature drops, the flannel delivers the warmth you need without the stuffiness of synthetic fabrics.

Bedtime relaxation starts with the right nightwear for men. This nightshirt is practical, long-lasting, and earns its keep through the cold months.

Care Instructions

Machine wash at 30 degrees, inside out. Skip softener as it coats the fibres and reduces natural warmth. Line dry or dry flat. The flannel does not need ironing, which keeps the laundry routine simple.

With correct care the flannel holds its cosy texture for years. Avoid tumble drying at high heat, which can shrink the weave and break down the brushed surface over time. A pair of these nightshirts, alternated through the week, will last several seasons.

Dressing Gowns, Pyjamas and Loungewear

If you want a two-piece option, the men's pyjamas collection at Mariner Underwear covers a full range of styles for every season, including long pyjama sets in grey flannel and striped poplin, as well as mix-and-match separates. For layering over a robe on cold mornings, the men's dressing gown range adds cosy comfort beyond bedtime. For a laid-back, all-day look at home, men's loungewear sits between daywear and sleepwear. And for warmer months, men's pyjama shorts are a lighter alternative when the temperature climbs.

Frequently Asked Questions

What is the difference between a nightshirt and men's pyjamas?

A nightshirt is a single piece worn without trousers. Men's pyjamas are a two-piece pyjama set with a coordinated top and pyjama bottoms. A nightshirt has no waistband and tends to feel roomier during sleep.

Is flannel nightwear too warm for UK summers?

Flannel combed cotton is best suited to autumn and winter. For warmer nights, lighter cotton nightwear is more practical. The Mariner Underwear flannel nightshirt is designed as a winter garment, cosy in cold conditions and breathable enough for mild evenings.

What size should I buy for men's nightwear?

Take your normal clothing size. The cut is relaxed and generous. If you are between sizes or prefer extra room, go up one size. Sizes run M to XXL.

How should I wash a flannel nightshirt?

Machine wash at 30 degrees, inside out, without fabric softener. Line dry or dry flat. Avoid tumble drying at high heat to keep the flannel soft and correctly sized.

What makes combed cotton different from regular cotton?

Combed cotton has had the shorter, coarser fibres removed before weaving. What remains are the longer, smoother fibres, which produce a denser, finer weave that wears well over time without pilling. Better warmth and comfort than standard cotton.

Is this nightwear suitable as a gift?

Yes. A classic flannel nightshirt in a traditional navy check print makes a practical and lasting gift for men who prefer comfort over novelty. A thoughtful choice for winter birthdays or Christmas. It comes in a range of sizes from M to XXL.

Does Mariner Underwear make other men's nightwear styles?

The men's nightwear range focuses on the traditional flannel nightshirt. For other styles, the men's pyjamas collection covers long sets, short sets, and pyjama bottoms. The men's loungewear and men's dressing gown ranges complete the full nightwear for men offer.